Intermec 6822 6820 Printer Installation Instructions - Page 15

Verifying the Printer Power Cable Voltage Note: This is the correct polarity for 6820 Printers. Verify the printer power cable voltage and polarity (as indicated), then plug the printer DC power cable into the printer power connector. + Use a volt meter to test the cable before connecting the cable to the 6820 Printer. Set the voltmeter for DC volts. Voltmeter Readings for Printer Power Cable Voltmeter Voltmeter Black Reading Red Lead Lead DC Volts Pin 1 Pin 2 12-15 Pin 1 Pin 2 Pin 3 Pin 3 12-15 0 Meaning • If zero volts, check the battery connections. • If a negative voltage, the wires on the battery are reversed. Do not connect to printer. • If less than 12 volts, vehicle battery or connections are bad • If more than 15 volts, connection is across more than one 12-volt battery or truck charging system is faulty. Do not connect to printer. If zero volts, check the connection done on the previous page. If not zero volts, check the connection to the battery negative terminal and the connection done on the previous page. 6820 Printer Installation Instructions 15